Two long-range B-1 bombers from Texas and a B-52 Stratofortress from Louisiana landed at Royal Air Force (RAF) Fairford in Gloucestershire on Wednesday, CNN reports.

They will conduct flyovers in Slovakia and Poland before taking part in Ample Strike 2017 exercises hosted by the Czech Republic. More than 30 aircraft, helicopters, and unmanned aerial vehicles (UAVs) from eight allied nations will also conduct live-fire drills from August 28 to September 9.

The exercise intends to focus on air and land integration training, as well as strengthening interoperability between NATO ally and partner nations, US European Command said in a statement.

According to CNN, the display is meant to serve as a show of force against Russia, which is preparing to conduct war games in Belarus next month.

According to Keir Giles, a senior consulting fellow for the Russia and Eurasia program at Chatham House, the Russian military exercise called ‘Zapad,’ which means ‘West,’ causes the most concern as it resembles a Russian invasion.